package code.netty.chat;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

import java.util.Scanner;

/**
 * @author rocky
 */
public class ChatClient {

    // 属性
    private final String host;

    private final int port;

    public ChatClient(String host, int port) {
        this.host = host;
        this.port = port;
    }

    public void run() {
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap bootstrap = new Bootstrap().group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {
                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    // 获取 pipeline
                    ChannelPipeline pipeline = ch.pipeline();
                    // 向pipeline 加入解码器
                    pipeline.addLast("decoder", new StringDecoder());
                    // 向pipeline 加入编码器
                    pipeline.addLast("encoder", new StringEncoder());
                    // 加入业务需要处理的 handler
                    pipeline.addLast(new ChatClientHandler());
                }
            });
            ChannelFuture channelFuture = bootstrap.connect(host, port).sync();
            // 得到channel
            Channel channel = channelFuture.channel();
            System.out.println("-----------" + channel.localAddress() + "---------");
            // 客户端需要输入信息,创建一个扫描器
            Scanner scanner = new Scanner(System.in);
            while(scanner.hasNextLine()) {
                String msg = scanner.nextLine();
                // 通过chanel 发送到服务器端
                channel.writeAndFlush(msg + "\n");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) {
        new ChatClient("127.0.0.1",7000).run();
    }
}
